Buffering form data in a dummy ember-data model

I have a use case where I don’t want bindings updated until a model successfully saves, but I’ve noticed a lot of the buffering advice out there uses an empty Ember.Object as the buffer. Does using a dummy model of the type being buffered make any sense? Would an approach like this (admittedly naive) first stab at a controller mixin be setting me up for a big pile of regrets down the line? I really want to keep the error clearing behavior as the form fields are changed.

import Ember from 'ember';

export default Ember.Mixin.create({
  buffer: function(){
    var model = this.get('model');
    var buffer = this.store.createRecord(model.constructor.typeKey)
    model.eachAttribute(function(name, meta) {
      buffer.set(name, model.get(name));
    return buffer;
  setModelFromBuffer: function(){
    var model = this.get('model'),
        buffer = this.get('buffer');
    model.eachAttribute(function(name, meta){
      var attrib = buffer.get(name);
      //if (attrib){
        model.set(name, attrib);
  pristineModel: function(){
    var model = this.get('model'),
        buffer = this.get('buffer');
      buffer.get('errors').add(error.attribute, error.message)